Sand-screen.



S. LITTLE & T. A. JGNES.

SAND SGREEN. APPLICATION FILED MAY 15, 1909.

Patented Oct. 19,1909.

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I Illllllllllllllllllllllllllllll g JOHN s. LITTLE ANLD aiHoMAsA. Jameson sArmnonanAaYLANn.

"SAND-SCREEN;-

' Specification of *Letters Patent.

TPatente dIOt. 19, .1909.

Application fi'led'iltfay" 15, 1909. =-Serial:N0:=496,144.

To all whom it mom/concern:

Be it known that we, J OHN S. LITTLE and THOMAS A. JONES, citizens of the United States, residing at Baltimore, in the county of Baltimore City and State of Maryland, have invented new and useful Improvements in Sand-Screens, of which the following is a specification.

Our invention relates to improvements in sand screening machines.

The principal object of the invention is the provision of a machine of this character wherein the screen shall, during the operation of the machine, have reciprocatory and vibratory movements alternately imparted thereto, whereby to effect a thorough screening of the sand and to effect the discharge of the coarse sand from the screen.

The invention comprehends a screening machine which shall be simple, durable and eflicient of construction, which may be manually operated, and which may be manufactured and sold at a comparatively low cost.

The invention consists in the construction, combination and arrangement of parts hereinafter fully described, claimed and illustrated in the accompanying drawing, where- 1n:-

Figure 1 is a view in side elevation of a sand screening machine constructed in accordance with our invention. Fig. 2 is a central longitudinal sectional view of the machine, and Fig. 3 is a view in rear end elevation of the machine.

Like numerals of reference are employed to designate the same parts in the several views of the drawing.

Our improved sand screening machine comprises a frame which consists of a pair of front standards 2 and a pair of rear standards 3. The front standards 2 are united by a member 4 which extends from the lower ends of the standards to a point adjacent their transverse centers and which separates the different grades of sand. The rear standards 3 are united by a cross piece 5 which is secured thereto adjacent their upper ends. The pairs of standards are united by side bars 6 which are secured at their ends to the standards. Vertical supports 7, which are secured at their lower ends to the sides of the bars 6, are arranged in parallel relation to the rear standards 3. A front bar 8 is secured to the supports 7 adjacent their upper ends, and side bars 9 are secured to the supports and to the rear standards 3 a?djacenttheir upper ends, said bars and the cross piece5 forminga supportin frame for a hopper 10. The hopper 13 fully open at its under side, and a closure 11 for said side is slidably mounted in ways 12 formed in the side walls of the hopper.

A screen, which comprises side 13, an end' 14:, and a reticulated panel 15, is pivotally secured at its front or discharge end to and between the front standard 2 by means of hangers 16. The front ends of the sides 13 are held against relative lateral movements by a cross piece 17 which is secured to the under sides thereof adjacent their front ends. The rear end of the screen is supported by a connecting rod 18, which is secured at its front end to a cross bar 19 of the screen and which is secured at its rear end to the crank 20 of a shaft 21. The shaft 21 is journaled in bearings 22 secured to the rear standards 3, and it is provided with a crank handle 23. The connection between the screen and the shaft 21 is such that when the shaft is rotated the screen is reciprocated. A pair of tappet wheels 24 are secured to the shaft 21, one on each side of the crank 20. During the rotation of the shaft 21 the arms of the tappet wheels are adapted to successively engage a tappet board 25 secured to the under side of the screen adjacent its rear end. The tappet wheels are adapted to impart a vibratory movement to the screen.

As the screen, during the operation of the machine, has alternate reciprocatory and vibratory movements imparted thereto, it should be apparent that the sand will be thoroughly screened, and that the coarse sand will be discharged from the front end of the screen, the member or board 4 separating the difierent grades of sand. When it is desired to place sand upon the screen the closure 11 is removed.

While we have described the method of operation of the invention, together with the apparatus which we now consider to be the best embodiment thereof, We desire to have ,itunderstood that the apparatus shown is merely illustrative, and that such changes may be made when desired as are within the scope of the claims.

Having thus described the invention, what is claimed as new, is

1. A sand screening machine comprising a frame, a crank shaft journaled on the frame, a screen, means pivotally securing one end of the screen to the frame, a connecting rod secured at one end to the screen andat its S cured to the shaft one on each side of the opposite end to the crank of the shaft, a tapcrank, and a crank handle secured to the pet Wheel secured to the shaft, and a crank shaft.

handle secured to the shaft. 1 In testimony whereof we afiix our signa- 5 2. A sand screening machine comprising a tures in presence of two Witnesses.

frame, a crank shaft journaled on the frame, JOHN S. LITTLE.

a screen, hangers securing one end of the THOMAS A. JONES.

screen to the frame, a connecting rod secured Witnesses:

at one end to the screen and at its opposite end W. MoMAHoN,

10 to the crank of the shaft, tappet Wheels se- FRANK L. FREDERICK. 

